Note 9 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Jun. 30, 2024
Goodwill	$ 152,492	$ 146,685
Accumulated impairment losses	(89,288)	(89,288)
Goodwill, net	63,204	57,397
Lighting Segment [Member]
Goodwill	70,971	70,971
Accumulated impairment losses	(61,763)	(61,763)
Goodwill, net	9,208	9,208
Display Solutions Segment [Member]
Goodwill	81,521	75,714
Accumulated impairment losses	(27,525)	(27,525)
Goodwill, net	$ 53,996	$ 48,189